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CVE-2020-16127

Published: 3 November 2020

An Ubuntu-specific modification to AccountsService in versions before 0.6.55-0ubuntu13.2, among other earlier versions, would perform unbounded read operations on user-controlled ~/.pam_environment files, allowing an infinite loop if /dev/zero is symlinked to this location.

Notes

AuthorNote
mdeslaur
This vulnerability is in an Ubuntu-specific patch and doesn't
affect the upstream code.

Priority

Medium

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
accountsservice
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code not present)
focal
Released (0.6.55-0ubuntu12~20.04.4)
groovy
Released (0.6.55-0ubuntu13.2)
trusty Not vulnerable
(code not present)
upstream Needs triage

xenial Not vulnerable
(code not present)

Severity score breakdown

Parameter Value
Base score 5.5
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H